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The number of possible natural oscillati...

The number of possible natural oscillations of air column in a pipe closed at one end of length 85 cm whose frequencies lie below 1250 Hz are (velocity of sound `=340ms^(-1)`).

A

3

B

4

C

5

D

6

Text Solution

Verified by Experts

The correct Answer is:
D
`f_a = (V_1)/(4l_0) = (340)/(4 xx 85 xx 10^(-2))`
`f_0 = 100 Hz`
Only odd harmonics are produced
`100 Hz, 300 Hz, 500 Hz, 700 Hz, 900 Hz, 1100 Hz`
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